Muhammed-
None of the likely pictures for our universe has an edge. There's good evidence that the universe is almost 'flat'. That means that it's very hard to tell whether it lacks an edge because it’s infinite in all directions or because on some very large scale (at least hundreds of times the length of the visible universe) it wraps around on itself.
You may find that idea of wrapping around strange, but it’s easy to picture for smaller dimensional spaces, like the surface of a sphere.
Of course some more complicated picture of the universe may come up, but for now try to imagine it without an edge.
Mike W.
(published on 10/22/2007)
